The simple answer here is "No. There is no legitimate way for you to get plutonium. You don't need it, or want it, for a reactor. If you're serious, I hope someone is watching you; if you aren't, stop now."

There are some gags which can get the joker in serious trouble before they can explain their way out. This is one. Given the current "security theater" climate in the US, which is getting to the point where it's arguably causing law enforcement to commit civil rights violations, I _really_ wouldn't risk this one right now.

Sorry to be a wet blanket. Feel free to ignore me. But I felt someone had to make this clear.

Weapons-grade plutonium is a crappy reactor fuel. You can use a mixture of U-235 and Pu-238 (not the weapons material), in a so-called "mixed oxide" (MOX) fuel pellet.

As for building a reactor, you can do that much more easily with low-enriched uranium with a graphite moderator, which is less difficult to obtain. If you had done any research before posting, you would know that.

By the way, if you're trying to shock people, you would do a better job if you got the terminology correct.